Bioaccumulation, subcellular distribution and chemical forms of yttrium in rice seedling

作     者：Shengnan Zheng Caiyun Zhang Kailun Shi Jinxiao Wang Guanjun Sun Qiaochu Hu Fengyun Zhao Xue Wang 

作者机构：School of Life SciencesShandong University of Technology 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2018年第36卷第3期

页      面：331-336页

核心收录：

学科分类：09[农学] 0901[农学-作物学] 

基　　金：Project supported by Natural Science Foundation of Shandong Province,China(ZR2014DM010,ZR2015CL009) National Natural Science Foundation of China(30900071) 

主　　题：Subcelluar distribution Yttrium Detoxicity Tolerance Rice Rare earths 

摘      要：Yttrium（Y） accumulation in soil is a serious environment problem in China. To understand the mechanisms involved in Y tolerance and detoxification in rice seedling, the bioaccumulation, subcellular distribution, and chemical forms of Y was investigated in the present study. The results show that the content of Y both in roots and shoots increases with the increasing concentration of Y, and a large amount of Y is stored in roots. Subcellular distribution of Y in rice indicates that the majority of Y is bound to cell wall. Meanwhile, various chemical forms of Y is absorbed by rice. The greatest amount of Y is extracted by 2% hydrate acetic acid（HAc） and 0.6 mol/L HCl（particularly 2% HAc）, which indicates that most of Y is combined with un-dissolved phosphate and oxalate（particularly phosphate）. Cluster analysis, based on Y abundance levels, reveals the relationship between Y distribution patterns and chemical forms. Our results imply that Y forming of precipitates with phosphate（and/or oxalate） and depositing in the cell wall may be a key strategy for Y detoxicity and tolerance in rice.